Manual transfer switches and all-in-one inverters

[Gentleman Mike]

I hooked up a Sungold 10 kw to my home to act as a battery backup and it has AC input from the main breaker panel for passthrough and charging.

The AC output goes to a gen inlet on a Reliance transfer switch because I wanted the ability to bypass the unit entirely if there is ever an issue with it.

Only later did I realize that the AC input and output neutrals actually get connected to each other in the main breaker since the switch doesn't isolate them and wonder if it's a problem.

Is this bad? The unit appears to work perfectly both in grid passthrough and inverter mode, but could this be a problem at some point?

 

[ScrotusGobbleBottom]

I hooked up a Sungold 10 kw to my home to act as a battery backup and it has AC input from the main breaker panel for passthrough and charging.

The AC output goes to a gen inlet on a Reliance transfer switch because I wanted to the ability to bypass the unit entirely if there is ever an issue with it.

Only later did I realize that the AC input and output neutrals actually get connected to each other in the main breaker since the switch doesn't isolate them and wonder if it's a problem.

Is this bad? The unit appears to work perfectly both in grid passthrough and inverter mode, but could this a problem at some point?

I hope you get an answer. I believe your inverter may do the same thing tho... I think my inverter manual said that the in and out neutrals are connected. If this is the case then nothing to worry about. Hope someone else chimes in.

 

[Gentleman Mike]

Yep, they are connected internally but I think they're typically used with the output feeding a sub panel, while a transfer switch makes kind of a loop through the main panel with neutral which doesn't happen on a sub panel.

If I try to think about potential current flow logically, it seems like it's okay, but I'm not a professional electrician or anything. I wouldn't think current from other circuits would try to flow through the loop?